Switch cabinet signal simulation device

Abstract

The utility model discloses a switch cabinet signal simulation device, which comprises a power supply loop, the input end of the power supply loop is electrically connected with a direct current power supply, and the output end of the power supply loop is electrically connected with a protection device signal input point loop and a protection device respectively to provide power for the protection device signal input point loop and the protection device; the protection device signal input point loop comprises an input point loop power supply input end, an input point loop power supply output end, a switching pressing plate, a double-position relay and a switch; one ends of the switching pressure plate, the switch and the two-position relay are electrically connected with the input end of the opening point loop power supply, the other ends of the switching pressure plate, the switch and the two-position relay are electrically connected to the output end of the opening point loop power supply, and on-off debugging signals of the switching pressure plate, the switch and the two-position relay are input to the protection device through the output end of the opening point loop power supply; the protection device signal output point loop comprises an indicating lamp which outputs a debugging signal through the protection device and is used for displaying a debugging result, one end of the indicating lamp is connected with the output end of the protection device, and the other end is connected with a power supply cathode.

Description

Technical Field

[0001] This utility model relates to a switchgear simulation device, and in particular to a switchgear signal simulation device. Background Technology

[0002] Equipment aging is inevitable in the power grid. China Southern Power Grid stipulates that power grid protection equipment needs to be replaced after approximately 15 years. Therefore, after years of operation, many pieces of equipment built before 2007 have been gradually replaced. During the comprehensive renovation of the entire power grid, when the protection devices inside the switchgear reach their replacement period before the equipment itself has reached its limit, it is common to need to modify the original switchgear. Current technology for replacing protection devices in 10kV switchgear involves installing the new protection device inside the switchgear, wiring the protection device, and then debugging the protection device. If a problem is found during debugging, another protection device needs to be replaced and the wiring repeated. Furthermore, due to the large number of switchgear units, this results in a long construction period during the comprehensive renovation of the entire power grid. Utility Model Content

[0003] The purpose of this invention is to provide a switchgear signal simulation device that can pre-determine the protection device, so as to shorten the construction period of the power grid substation comprehensive renovation.

[0004] The switchgear signal simulation device of this utility model includes a power supply circuit, a protection device signal input circuit, and a protection device signal output circuit.

[0005] The input terminal of the power supply circuit is electrically connected to a DC power supply, and the output terminal is electrically connected to the signal input circuit of the protection device and the protection device, respectively, to provide power to the signal input circuit of the protection device and the protection device.

[0006] The protection device signal input circuit includes an input circuit power input terminal, an input circuit power output terminal, a shift / reset pressure plate, a dual-position relay, and a switch.

[0007] One end of the engagement / disengagement pressure plate, switch, and dual-position relay is electrically connected to the power input terminal of the input circuit, and the other end is electrically connected to the power output terminal of the input circuit. The commissioning signals for closing and opening of the engagement / disengagement pressure plate, switch, and dual-position relay are input to the protection device through the power output terminal of the input circuit.

[0008] The protection device signal output circuit includes an indicator light that displays the debugging results after the debugging signal is output by the protection device. One end of the indicator light is connected to the output terminal of the protection device, and the other end is connected to the negative terminal of the power supply.

[0009] As a preferred embodiment of this utility model, the engagement / disengagement pressure plate includes a locking reclosing engagement / disengagement pressure plate for closing and debugging the protection device to lock the reclosing, a low-frequency load shedding engagement / disengagement pressure plate for closing and debugging the protection device to reduce low-frequency load, a high-frequency tripping engagement / disengagement pressure plate for closing and debugging the protection device to trip high-frequency load, and a maintenance engagement / disengagement pressure plate for closing and debugging the protection device to repair the maintenance pressure plate.

[0010] As a preferred embodiment of this utility model, after the dual-position relay is powered on, when one position relay connects the power supply to the protection device for switch opening adjustment, the other position relay is disconnected; when one position relay is disconnected, the other position relay connects the power supply to the protection device for switch closing adjustment.

[0011] As a preferred embodiment of this utility model, the switch includes: a trolley working state switching switch for connecting the power supply to the protection device for debugging the trolley to the working position or the trolley to the test position; a grounding switch for connecting the power supply to the protection device for debugging the grounding switch to the closed and open positions; and a handle switching switch for connecting the power supply to the protection device for debugging the handle locally.

[0012] As a preferred embodiment of this utility model, the switch further includes: a spring-unstored-energy button switch for connecting the power supply to the protection device for debugging when the spring is not stored; a reset button switch for connecting the power supply to the protection device for debugging and resetting; an energy storage power supply fault button switch for connecting the power supply to the protection device for debugging when the energy storage power supply is faulty; and a remote signaling power supply fault button switch for connecting the power supply to the protection device for debugging when the remote signaling power supply is faulty.

[0013] As a preferred embodiment of this utility model, the indicator lights include device fault indicator lights, device alarm indicator lights, protection action indicator lights, main accident indicator lights, control circuit disconnection indicator lights, reclosing indicator lights, and operation abnormality indicator lights.

[0014] As a preferred embodiment of this utility model, the switch cabinet signal simulation device is further provided with: a panel switch indicator light for indicating the switch closed and open positions, wherein the positive terminal of the panel switch indicator light is electrically connected to the dual-position relay and the negative terminal is connected to the negative terminal of the power supply;

[0015] The panel trolley indicator light is used to indicate whether the trolley working position and the trolley test position are connected. The positive terminal of the panel trolley indicator light is electrically connected to the trolley working status conversion switch, and the negative terminal is connected to the negative terminal of the power supply.

[0016] The panel floor switch indicator light is used to indicate whether the floor switch is in the closed or open position. The positive terminal of the panel floor switch indicator light is electrically connected to the floor switch working status change switch, and the negative terminal is connected to the negative terminal of the power supply.

[0017] As a preferred embodiment of this utility model, the switchgear signal simulation device is also equipped with terminals for debugging the protection measurement voltage, protection current, measurement current, and zero-sequence current of the protection device.

[0018] As a preferred embodiment of this utility model, a DC air switch is provided in the power supply circuit.

[0019] The switchgear signal simulation device described in this utility model simulates switchgear signals by using a switching plate, a switch, and a double-position relay to close and open. The signals are then input to the protection device via the power output terminal of the input circuit, and the results are displayed by indicator lights. The protection device can be pre-calibrated and directly connected to the switchgear to be modified for operation, eliminating the need for repeated wiring and debugging during the overall power grid renovation process, thus shortening the renovation period. Furthermore, the power supply circuit, the protection device signal input circuit, and the protection device signal output circuit provide power to the protection device for debugging, eliminating the need for prolonged power outages in the switchgear to be modified, thereby shortening the normal acceptance time during power outages and better ensuring the normal operation of production equipment. In addition, by replacing all the functions of the entire switchgear with indicator lights, switching plates, switches, and double-position relays, the device is compressed into a switchgear signal simulation device the size of a distribution box, making it more portable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a switchgear signal simulation device according to the present invention;

[0021] Figure 2 This is a circuit diagram of the power supply circuit of this utility model;

[0022] Figure 3 The circuit diagram of the signal input point loop of the protection device of this utility model is shown below.

[0023] Figure 4 The circuit diagram of the signal output point loop of the protection device of this utility model and the connection diagram of the protection device are shown.

[0024] Figure 5 This is the circuit diagram of the indicator light panel of the protection device of this utility model;

[0025] Figure 6 This is a circuit diagram for the wiring terminals. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0027] A switchgear signal simulation device, such as Figure 1 As shown, it includes a power supply circuit, a protection device signal input circuit, and a protection device signal output circuit; the input terminal of the power supply circuit is electrically connected to a DC power supply, and the output terminal is electrically connected to the protection device signal input circuit and the protection device respectively, providing power to the protection device signal input circuit and the protection device; the protection device signal input circuit includes an input circuit power supply input terminal, an input circuit power supply output terminal, a shift / reset plate, a dual-position relay, and a switch;

[0028] One end of the engagement / disengagement pressure plate, switch, and dual-position relay is electrically connected to the power input terminal of the input circuit, and the other end is electrically connected to the power output terminal of the input circuit. The commissioning signals for closing and opening of the engagement / disengagement pressure plate, switch, and dual-position relay are input to the protection device through the power output terminal of the input circuit. The protection device signal output circuit includes an indicator light that displays the commissioning results after the commissioning signal is output by the protection device. One end of the indicator light is connected to the output terminal of the protection device, and the other end is connected to the negative terminal of the power supply.

[0029] By simulating the switching cabinet signals through the opening and closing of the switching plate, switch, and double-position relay in the simulation device, the signals are then input to the protection device via the power output terminal of the input circuit. The results are displayed by indicator lights. The protection device can be pre-tested and directly connected to the switch cabinet to be modified for operation, eliminating the need for repeated wiring and debugging during the overall power grid renovation process, thus shortening the overall renovation period. In addition, the protection device is powered by the power supply circuit, the protection device signal input circuit, and the protection device signal output circuit, and then debugged. The switch cabinet to be modified does not need to be shut down for a long time, thus shortening the normal acceptance time during power outages and better ensuring the normal operation of production equipment. Furthermore, all the functions of the entire switch cabinet are replaced by indicator lights, switching plates, switches, and double-position relays, compressed into a switch cabinet signal simulation device the size of a distribution box, making it more portable.

[0030] like Figure 2 As shown, a DC air switch 1-1K is installed in the power supply circuit, which allows for better management of the power supply circuit. The input terminal of the power supply circuit is connected to a DC power supply, and the power is transmitted through the DC air switch 1-1K to the signal input circuit of the protection device and the protection device, respectively.

[0031] like Figure 3As shown, the signal input circuit of the protection device includes a reclosing interlock ... The maintenance activation / deactivation pressure plate LP8 is used for the maintenance pressure plate of the closed-loop debugging protection device. One end of the maintenance activation / deactivation pressure plate LP8 is electrically connected to the power input terminal of the open-loop circuit, and the other end is electrically connected to the protection device through the power output terminal of the open-loop circuit.

[0032] After the dual-position relay MD is powered on, when one position relay connects the power supply to the protection device for switch opening debugging, the other position relay is open; when one position relay is open, the other position relay connects the power supply to the protection device for switch closing debugging. The first contact 1 of the dual-position relay MD is electrically connected to the power input terminal of the input circuit, the second contact 2 is electrically connected to the power output terminal of the input circuit, the third contact 3 is electrically connected to the power input terminal of the input circuit, and the fourth contact 4 is electrically connected to the power output terminal of the input circuit.

[0033] like Figure 5 As shown, the switch cabinet signal simulation device also includes a panel switch indicator light ED1. The first positive terminal of panel switch indicator light ED1 is electrically connected to the sixth contact 6 of the double-position relay MD, and the first positive terminal of panel switch indicator light ED1 is electrically connected to the eighth contact 8 of the double-position relay MD. The negative terminal of panel switch indicator light ED1 is electrically connected to the negative terminal of the power supply. The fifth contact 5 of the double-position relay MD is electrically connected to the positive terminal. The first contact 1, first contact 2, fifth contact 5, and sixth contact 6 of the double-position relay MD belong to one of the relays in the double-position relay MD, and are mainly used to connect the power supply to the protection device for switch-closed debugging. The seventh contact 7 of the double-position relay MD is electrically connected to the positive terminal. The third contact 3, fourth contact 4, seventh contact 7, and eighth contact 8 of the double-position relay MD belong to the other relay in the double-position relay MD, and are mainly used to connect the power supply to the protection device for switch-open debugging. Panel switch indicator light ED1 indicates whether the switch is closed or open.

[0034] The switches include a trolley operating status switch ZKK1, a grounding switch ZKK2, and a handle switch ZKK3. The handle switch ZKK3 is used to connect the power supply to the protection device for localized handle debugging.

[0035] The trolley operating status conversion switch ZKK1 is used to connect the power supply to the protection device for debugging the trolley to the working position or the test position. The switch cabinet signal simulation device is also equipped with a panel trolley indicator light ED2 to indicate whether the trolley is in the working position or the test position. The positive terminal of the panel trolley indicator light ED2 is electrically connected to the trolley operating status conversion switch ZKK1, and the negative terminal is connected to the negative terminal of the power supply.

[0036] The ZKK2 switch for changing the working status of the grounding switch is used to connect the power supply to the protection device for debugging the grounding switch's closed and open positions. The switch cabinet signal simulation device is also equipped with a panel grounding switch indicator ED3 to indicate the closed and open positions of the grounding switch. The positive terminal of the panel grounding switch indicator ED3 is electrically connected to the ZKK2 switch for changing the working status of the grounding switch, and the negative terminal is connected to the negative terminal of the power supply.

[0037] The switch also includes a spring-uncharged button switch S1 for connecting the power supply to the protection device for debugging when the spring is not charged; a reset button switch FG for connecting the power supply to the protection device for debugging and resetting; an energy storage power supply fault button switch DK1 for connecting the power supply to the protection device for debugging when the energy storage power supply is faulty; and a remote signaling power supply fault button switch DK2 for connecting the power supply to the protection device for debugging when the remote signaling power supply is faulty.

[0038] like Figure 4 As shown, the indicator lights include device fault indicator light ED4, device alarm indicator light ED5, protection action indicator light ED6, main accident indicator light ED7, control circuit disconnection indicator light ED8, reclosing indicator light ED9, and abnormal operation indicator light ED10.

[0039] In addition, such as Figure 6 As shown, the switchgear signal simulation device is also equipped with terminals for debugging the protection measurement voltage, protection current, measurement current, and zero-sequence current of the protection device.

[0040] The above embodiments are only used to illustrate the detailed solution of this utility model. This utility model is not limited to the above detailed solution, that is, it does not mean that this utility model must rely on the above detailed solution to be implemented. Those skilled in the art should understand that any improvement to this utility model, equivalent substitution of the raw materials of this utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this utility model.

Claims

1. A switchgear signal simulation device, characterized in that, This includes the power supply circuit, the protection device signal input circuit, and the protection device signal output circuit. The input terminal of the power supply circuit is electrically connected to a DC power supply, and the output terminal is electrically connected to the signal input circuit of the protection device and the protection device, respectively, to provide power to the signal input circuit of the protection device and the protection device. The protection device signal input circuit includes an input circuit power input terminal, an input circuit power output terminal, a shift / reset pressure plate, a dual-position relay, and a switch. One end of the engagement / disengagement pressure plate, switch, and dual-position relay is electrically connected to the power input terminal of the input circuit, and the other end is electrically connected to the power output terminal of the input circuit. The commissioning signals for closing and opening of the engagement / disengagement pressure plate, switch, and dual-position relay are input to the protection device through the power output terminal of the input circuit. The protection device signal output circuit includes an indicator light that displays the debugging results after the debugging signal is output by the protection device. One end of the indicator light is connected to the output terminal of the protection device, and the other end is connected to the negative terminal of the power supply.

2. The switchgear signal simulation device according to claim 1, characterized in that, The engagement / disengagement pressure plates include a reclosing engagement / disengagement pressure plate (LP5) for closing and debugging the protection device to lock the reclosing, a low-frequency load shedding engagement / disengagement pressure plate (LP6) for closing and debugging the protection device to reduce low-frequency load, a high-frequency tripping engagement / disengagement pressure plate (LP7) for closing and debugging the protection device to trip high-frequency load, and a maintenance engagement / disengagement pressure plate (LP8) for closing and debugging the protection device to perform maintenance.

3. The switchgear signal simulation device according to claim 1, characterized in that, When a dual-position relay (MD) is powered on, if one position relay connects the power supply to the protection device for switch opening adjustment, the other position relay is disconnected; if one position relay is disconnected, the other position relay connects the power supply to the protection device for switch closing adjustment.

4. The switchgear signal simulation device according to claim 3, characterized in that, The switches include: a trolley working state switching switch (ZKK1) for connecting the power supply to the protection device for debugging the trolley to the working position or the test position; a grounding switch (ZKK2) for connecting the power supply to the protection device for debugging the grounding switch to the closed and open positions; and a handle switching switch (ZKK3) for connecting the power supply to the protection device for debugging the handle to the local position.

5. The switchgear signal simulation device according to claim 4, characterized in that, The switch further includes: a spring-unstored button switch (S1) for connecting the power supply to the protection device for debugging when the spring is not stored; a reset button switch (FG) for connecting the power supply to the protection device for debugging and resetting; an energy storage power supply fault button switch (DK1) for connecting the power supply to the protection device for debugging when the energy storage power supply is faulty; and a remote signaling power supply fault button switch (DK2) for connecting the power supply to the protection device for debugging when the remote signaling power supply is faulty.

6. The switchgear signal simulation device according to claim 1, characterized in that, The indicator lights include device fault indicator light (ED4), device alarm indicator light (ED5), protection action indicator light (ED6), main accident indicator light (ED7), control circuit disconnection indicator light (ED8), reclosing indicator light (ED9), and operation abnormality indicator light (ED10).

7. The switchgear signal simulation device according to claim 4, characterized in that, The switch cabinet signal simulation device is also equipped with a panel switch indicator (ED1) for indicating the switch closed and open positions. The positive terminal of the panel switch indicator (ED1) is electrically connected to the dual position relay (MD), and the negative terminal is connected to the negative terminal of the power supply. The panel trolley indicator light (ED2) is used to indicate whether the trolley working position and the trolley test position are connected. The positive terminal of the panel trolley indicator light (ED2) is electrically connected to the trolley working status conversion switch (ZKK1), and the negative terminal is connected to the negative terminal of the power supply. The panel grounding indicator light (ED3) is used to indicate whether the grounding switch is in the closed or open position. The positive terminal of the panel grounding indicator light (ED3) is electrically connected to the grounding switch (ZKK2), and the negative terminal is connected to the negative terminal of the power supply.

8. The switchgear signal simulation device according to claim 1, characterized in that, The switchgear signal simulation device is also equipped with terminals for debugging the protection measurement voltage, protection current, measurement current, and zero-sequence current of the protection device.

9. The switchgear signal simulation device according to claim 1, characterized in that, A DC air switch (1-1K) is installed in the power supply circuit.

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